Improvement in door-checks



W. J. CLARKE.

DOOR-CHECKS.

Patented. June 27,1876.

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WITNESSES NPEIERS. PHOTO-LITHDGRAPHER. WASHMTON, D C

UNITED STATES PATENT OFFICE.

WILLIAM J. CLARKE, TRENTON, CANADA.

IMPROVEMENT IN DOOR-CHECKS.

Specification forming part of Letters Patent No. 179,269, dated June 27,1876; application filed May 22, 1876.

To all whom it may concern:

Be it known that I, WILLIAM JOSEPH CLARKE, of Trenton, in the county ofEastings,-Province of Ontario and Dominion of Canada, have invented anew and Improved Door-Check, of which the following is a specificationIn the accompanying drawing, Figure 1 represents a front elevation of myimproved doorcheck; Fig.2, a horizontal section of the same on line 0 c,Fig. 1; and Fig. 3, a detail view of the toothed latch-bar.

Similar letters of reference indicate corresponding parts.

The object of my invention is to provide for doors an improved checkdevice, by which the door may be readily retained at any positionwithout being moved back and forth by the wind, or otherwise beingreleased and thrown into use in an instant.

The invention consists of a toothed latchbar, raised in any suitablemanner, and locked by a slide with stop-pin applied to the end of aswinging lever hinged to the door-casing, as hereinafter more fullydescribed and definitely claimed. 7

In the drawing, A represents a door, of any size or shape; and B, alatch-bar that is pivoted to the same, and lifted for unlocking the doorby a button, tongue, or other device, or by rigid lever-arms applied tothe spindle of the door-lock. The latch-bar B is made in the shape of arack at its under side, or toothed, the teeth being inclined toward theswinging end of the latch-bar. A slide-piece, O, with a stop pin or lug,a, is pivoted to the end of a v lever-arm, D, and moves along thelatch-bar, when the same israised in opening the door, until, bydropping the latch-bar, the notches or teeth lock on the lug of theslide-piece, and hold the door thereby in position. The leverarm Dswings in a hinged socket, b, of the door-frame, and extends, by itsbent ends, into the socket and slide-piece. The door is prevented frommoving until the latchbar is again lifted and the slide released fromthe notches of the same.

If desired, the latch-bar may be rigidly retained in locked position, orin raised position, to be disengaged from the slide, by means of pivotedpieces arranged above and below the end of the latch, near the end ofthe same, as shown in dotted lines in Fig. 2. The door may thus beworked without the locking of latch and slide, and be retained inperfectly reliable and easily-working manner at any desired angle.

Having thus described my invention, I claim as new and desire to secureby Letters Patent-- A door-check composed of a notched or toothedlatch-bar, B, incombination with a slide-piece, 0, having a stop pin orlug, a, and with a swinging slide carrying lever-arm D, hinged to thedoor-frame, substantially in the manner and for the purpose set forth.

WILLIAM JOSEPH CLARKE. Witnesses: f

S. S. YOUNG, H. .W. DELANY.

